---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-108859"
form_type: "8-K"
ticker: "AEE"
cik: "0001002910"
company_name: "AMEREN CORP"
filed_at: "2026-09-18T17:07:51+00:00"
generated_at: "2026-09-18T17:09:06.438605+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Ameren closes $900M junior subordinated notes offering due 2057

## Summary
- Sold $900M principal of Junior Subordinated Notes due 2057 on Sept 18, 2026.
- Net proceeds of $891.0M before expenses from the offering.
- Offered under S-3 registration (File 333-297949) with prospectus supplement dated Sept 8, 2026.
- Underwriters include Barclays, BofA Securities, J.P. Morgan, Morgan Stanley, MUFG, Truist.
- Notes issued under indenture dated Sept 1, 2026 with BNY Mellon as trustee.

## SEC filing metadata
- accession: 0001104659-26-108859
- form_type: 8-K
- ticker: AEE
- cik: 0001002910
- company_name: AMEREN CORP
- filed_at: 2026-09-18T17:07:51+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/0001104659-26-108859-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/tm2625603d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-108859
- JSON: https://secwatch.observer/filing/0001104659-26-108859.json
- Plain text: https://secwatch.observer/filing/0001104659-26-108859.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.